package com.heima.app.filter;

import com.heima.app.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.boot.web.servlet.filter.OrderedFilter;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class AuthorizeFilter implements Ordered, GlobalFilter {
	@Override
	public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
		//1.获取Request对象和Response对象
		ServerHttpRequest request = exchange.getRequest();
		ServerHttpResponse response = exchange.getResponse();
		//2.判断是否登录
		if (request.getURI().getPath().contains("/login/login_auth")) {
			//放行
			return chain.filter(exchange);
		}
		//3.获取token
		String token = request.getHeaders().getFirst("token");
		//4.判断token是否存在
		if (StringUtils.isBlank(token)) {
			response.setStatusCode(HttpStatus.UNAUTHORIZED);
			return response.setComplete();
		}
		//5.判断tokne是否有效
		Claims claimsBody = AppJwtUtil.getClaimsBody(token);
		int verifyToken = AppJwtUtil.verifyToken(claimsBody);
		try {
			//是否过期
			if (verifyToken == 1 || verifyToken == 2) {
				response.setStatusCode(HttpStatus.UNAUTHORIZED);
				return response.setComplete();
			}
		} catch (Exception e) {
			e.printStackTrace();
			response.setStatusCode(HttpStatus.UNAUTHORIZED);
			return response.setComplete();
		}
		//6.放行
		return chain.filter(exchange);
	}

	//优先级设置，数值越小，优先度越高
	@Override
	public int getOrder() {
		return 0;
	}
}
